For sale is an Aquatec Air-3.
It is an integrated inflator, regulator and horn that came off of a Transpac that I recently bought. I had the Transpac serviced on July 17th (including the Air-3) and decided that I liked my octo setup better so I had the LDS take the Air-3 off for a regular power inflator..
This has only been used (more like dipped) in a pool for an OW course twice.
More information on this product can be found here:
Air-3 Regulator/Inflator/Horn Combo [Air-3] : AQUATEC USA, Scuba Diving Equipment
Lowest price I've seen was $129.95. I'll let this go for $90.00 paypal shipped in CONUS.